Investigation On The Inverse FEM For Structural Displacement Reconstruction

With the development of space science and technology, the flexible components in the space structure increase, which need to maintain a high accuracy in the running time. In order to understand the working performance of the spatial structure, the structural health monitoring of the flexible components must be carried out.Structural Displacement Reconstruction in health monitoring is a series of sensors, which can be embedded in the form of paste or paste, and the measurement value of the dynamic response of the system in time sampling. Structural health monitoring system is a kind of automatic system, which is based on the structure of continuous monitoring, inspection and detection of structural damage, and finally through remote or local area network.In this paper, the inverse finite element method based on beam and plate structures is used to analyze the inverse problem, and the results are compared with the results of the finite element method. According to the traditional finite element theory, we established eight node hexahedron element, and joined enhanced assumed strain(EAS). A new inverse finite element method is proposed, which is applied with the strain which is calculated by ABAQUS. The least square method is used to approximate the theoretical data and the data calculated by ABAQUS. The density of the mesh is reduced by using the inverse finite element method, and the results are compared with the traditional finite element method. The results show that the error of the results obtained by the new method is within 5%, Achieved comprehensive structural health monitoring.